Lattice doping of Zn boosts oxygen vacancies in Co3O4 Nanocages: Improving persulfate activation via forming Surface-Activated complex

Constructing oxygen vacancies by doping Mo into spinel Co3O4 to trigger a fast oxide path mechanism for acidic oxygen evolution reaction

“…The EPR spectrum of V O -Mo x Co 3− x O 4 shows a sharp increase in the intensity of the g -factor at 2.003, suggesting the successful construction of oxygen vacancies by doping Mo into Co 3 O 4 . 28…”

Modular preparation of functional bimetallic spinels from metal–organic frameworks: a deep exploration from macro and micro perspectives

“…Wang and co-workers introduced Zn elements from ZIF-8 into ZIF-67 to construct ZnCo 2 O 4 nanocages (OVs-ZnCo 2 O 4 HNCs), which contained abundant OVs. 112 According to the results of applied DFT, the adsorption energy of the OV-containing materials for peroxydisulfate (PDS) molecules was −4.50 eV, which was lower compared to the OV-free materials. The superior adsorption performance promoted the enrichment of PDS on the surface of OVs-ZnCo 2 O 4 HNCs, thus facilitating the formation of a surface-active composite of PDS with the materials to enhance degradation.…”

ZnCo2O4/NC Hollow Polyhedra for Bisphenol A Disposal and the Oxygen Evolution Reaction

“…However, some previous studies demonstrated that the direct thermal treatment of ZIF-67 did not result in the formation of cobalt oxide with desirable activity to break the O–O bond of PDS with a relatively higher energy. , Accordingly, various strategies have been adopted in order to boost the activity of Co 3 O 4 solids. For example, doping other metal ions and the construction of a hollow structure with ZIF-67 to form composite oxides could improve the catalytic performances to some extent. − In our previous work, hollow ZIF-8/ZIF-67 and nickel-doped ZIF-8/ZIF-67 could lead to the formation of hollow ZnO-Co 3 O 4 /NC and NiCo 2 O 4 –ZnO-Co 3 O 4 /NC composites with promoted BPA degradation activities in the presence of PDS, and it was indicated that the promotion of BPA degradation could be ascribed to the small size of the active species and the synergistic effect among the components. , In addition, Xu revealed that the lattice doping of Zn-boosted oxygen vacancies (O Vs ) in Co 3 O 4 nanocages could increase the number of O Vs in the catalysts and facilitate the degradation of BPA with PDS …”